Mop wringer



FIG. 1 is a top plan view of a mop wringer showing our new design.

FIG. 2 is a side elevational view.

FIG. 3 is a front elevational view.

FIG. 4 is a rear elevational view.

FIG. 5 is a front perspective view thereof.

FIG. 6 is a rear perspective view thereof. 

The ornamental design for a mop wringer, as shown and described. 